The line spectrum of lithium has a red line at 670.8 nm. Calculate the energy of a photon with this wavelength.

When identifying minerals, scientists often look at the color of the mineral when it is in powdered form. What is this color called? A. the grain of the mineral B. the color of the mineral C. the streak of the mineral D.

In an exactly. 200M solution of benzoic acid, a monoprotic acid, the [H+] = 3.55 * 10-3M. What is the Ka for benzoic acid?

Question 19 Write a balanced half-reaction for the oxidation of gaseous nitrogen dioxide to nitrate ion in acidic aqueous solution. Be sure to add physical state symbols where appropriate.

chlorine has an average atomic mass of 35.45 amu. the two naturally occurring isotopes of chlorine are clorine-35 and chlorne - 37 why doesthis idicate that most clorine atoms contain 18 neutrons

The molar mass of an unknown organic liquid (M ~ 100) is determined by placing 5 mL of the liquid in a weighed 125-mL conical flask fitted with a piece of Al foil with a pin hole in it.

What type of chemical process is used to create perfume?

Which of the following is a polyatomic ion? O A. HCI O B. Na O C. PO, O D. 52

What are the cations and anions for V2 (CO3) 3

If you were asked to convert 4.2 x 1022 atoms of aluminum to moles, which of the following should you use for the conversion?

Carbonic acid (H2CO3) does not dissortate 100 percent in water. What type of substance is it? weak acid Strong base strong acid weak base